The Washington Capitals were playing the Florida Panthers [Feb. 1997]. The Capitals Peter Bondra kneed the Panthers Ray Shepphard, who had to be carried off the ice. Bondra was given a 5 minute major penalty. The next period, Johan Garpenlov of the Panthers slashed the Capitals Joe Juneau, who needed help getting off the ice. Garpenlov was thrown out of the game. In sports his action was known as “pay back.”

Rather than forgiving & forgetting, our flawed instinct is to "pay back" rather than forgive.